'A darned shame': Democrats hoped one thing would be the key toward unity — but many Bernie supporters aren't buying it

PHILADELPHIA — Sen. Bernie Sanders' top surrogates at the Democratic convention Monday had a not-so-subtle plea for unity to diehard "Bernie-or-bust" delegates: Remember the party platform.

Throughout the first day of the Democratic National Convention, high-profile Sanders supporters touted the concessions Democratic Party leadership made to the senator's supporters in reforming the party, the formal set of goals that were officially adopted by the party Monday.

Maine state Rep. Diane Russell touted the Democratic National Committee's decision to consider removing superdelegates, Democratic Party officials whose votes play a small role in selecting presidential candidates.

Introducing Sanders at the convention on Monday, former Sanders surrogate Rep. Keith Ellison noted the ways the Sanders campaign influenced the official Democratic Party platform. He mentioned the adoption of provisions like support for a $15 federal minimum wage and heavy regulations on hydraulic fracturing, a process that environmentalists deride for its unwanted side-effects.

"Tonight, we are united around the most progressive platform in history," Ellison said.

"That's the platform that we can make the law of the land if we stand together, if we work together, and if we vote together on November 8," he added.

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U.S. First Lady Michelle Obama speaks during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Daniel Acker/Bloomberg via Getty Images

A delegate wears a jacket reading 'Feel The Bern' during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: John Taggart/Bloomberg via Getty Images

Delegates hold signs against the Trans-Pacific Partnership (TPP) during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Daniel Acker/Bloomberg via Getty Images

Supporters of former Democratic U.S. presidential candidate Senator Bernie Sanders hug and cry at the end of Sanders' speech during the first session at the Democratic National Convention in Philadelphia, Pennsylvania, U.S., July 25, 2016. REUTERS/Jim Young

Wisconsin delegate Angie Aker wears tape covering her mouth during the first day of the Democratic National Convention in Philadelphia , Monday, July 25, 2016. (AP Photo/John Locher)

California delegate Eddie Cisneros gives his thumb down during the first day of the Democratic National Convention in Philadelphia , Monday, July 25, 2016. (AP Photo/Matt Rourke)

PHILADELPHIA, PA - JULY 25: Bernie Sanders speaks to the crowds at the 2016 Democratic National Convention-Day 1 at Wells Fargo Center on July 25, 2016 in Philadelphia, Pennsylvania. (Photo by Earl Gibson III/WireImage)

Delegates hold signs against the Trans-Pacific Partnership (TPP) during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Andrew Harrer/Bloomberg via Getty Images

An attendee wears a red hat with campaign buttons in support of Hillary Clinton, presumptive 2016 Democratic presidential nominee, during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Andrew Harrer/Bloomberg via Getty Images

Delegates hold up signs as they react during the first day of the Democratic National Convention in Philadelphia , Monday, July 25, 2016. (AP Photo/Carolyn Kaster)

Delegates stand during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Daniel Acker/Bloomberg via Getty Images

A Bernard Sanders supporter with a fake bird on his shoulder is seen on the floor on Day 1 of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, July 25, 2016. / AFP / Timothy A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

Delegates cheer during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: John Taggart/Bloomberg via Getty Images

A delegate holds a campaign sign in support of Senator Bernie Sanders, an independent from Vermont, during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: John Taggart/Bloomberg via Getty Images

Delegates stand for the Pledge of Allegiance during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Andrew Harrer/Bloomberg via Getty Images

A supporter from California of Former Democratic Presidential candidate, Sen. Bernie Sanders, I-Vt., holds up signs during the first day of the Democratic National Convention in Philadelphia , Monday, July 25, 2016. (AP Photo/Matt Rourke)

Barney Frank, left, and Leticia Van de Putte, chairs of the rules committee for the DNC, wave while arriving on stage during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Andrew Harrer/Bloomberg via Getty Images

Stephanie Rawlings-Blake, mayor of Baltimore, speaks during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: David Paul Morris/Bloomberg via Getty Images

A delegate wears an American flag themed hat during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Andrew Harrer/Bloomberg via Getty Images

James Roosevelt and Lorraine Miller, chairs of the Rules and Bylaws Committee of the DNC, speaks during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: David Paul Morris/Bloomberg via Getty Images

A delegate wears tape over her mouth reading 'Silenced' during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Daniel Acker/Bloomberg via Getty Images

A supporter of former Democratic presidential candidate Bernie Sanders holds up a Sanders "Feel the Bern" campaign banner as others hold up "Love trumps hate" signs during the first session at the Democratic National Convention in Philadelphia, Pennsylvania, U.S. July 25, 2016. REUTERS/Mark Kauzlarich

PHILADELPHIA, PA - JULY 25: Delegates hold up signs that read 'Trans-Pacific Partnership (TPP)' on the first day of the Democratic National Convention at the Wells Fargo Center, July 25, 2016 in Philadelphia, Pennsylvania. An estimated 50,000 people are expected in Philadelphia, including hundreds of protesters and members of the media. The four-day Democratic National Convention kicked off July 25. (Photo by Jessica Kourkounis/Getty Images)

Democratic National Committee (DNC) Chairwoman Debbie Wasserman Schultz speaks at a rally, before the arrival of Democratic U.S. presidential candidate Hillary Clinton and her vice presidential running mate U.S. Senator Tim Kaine, in Miami, Florida, U.S. July 23, 2016. Picture taken July 23, 2016. REUTERS/Scott Audette

Supporter for former Democratic Presidential candidate, Sen. Bernie Sanders, I-Vt., John Stanley from DeForest Wis., yells as he and other Sanders supporters react during the first day of the Democratic National Convention in Philadelphia , Monday, July 25, 2016. (AP Photo/John Locher)

Supporters of Sen. Bernie Sanders, I-Vt., march during a protest in downtown Philadelphia, Monday, July 25, 2016, on the first day of the Democratic National Convention. On Sunday, Debbie Wasserman Schultz announced she would step down as DNC chairwoman at the end of the party's convention, after emails presumably stolen from the DNC by hackers were posted to the website Wikileaks. (AP Photo/John Minchillo)

People march protecting the DNC email wikileaks scandal and holding signs in support of former Democratic presidential candidate Bernie Sanders during a protest at the 2016 Democratic National Convention, July 25, 2016 in Philadelphia, Pennsylvania. / AFP / Patrick T. Fallon (Photo credit should read PATRICK T. FALLON/AFP/Getty Images)

A protestor chants through a megaphone as he marches during a demonstration in downtown on Sunday, July 24, 2016, in Philadelphia. The Democratic National Convention starts Monday. (AP Photo/John Minchillo)

A delegate holds a Democratic party donkey sign during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Daniel Acker/Bloomberg via Getty Images

People protest through a security fence outside of the Wells Fargo Center, venue of the 2016 Democratic National Convention, during march holding signs in support of former Democratic presidential candidate Bernie Sanders during a protest outside the DNC, July 25, 2016 in Philadelphia, Pennsylvania. / AFP / Patrick T. Fallon (Photo credit should read PATRICK T. FALLON/AFP/Getty Images)

UNITED STATES - JULY 25: Supporters of Sen. Bernie Sanders, I-Vt., chant as delegates enter the security perimeter for the Wells Fargo Center in Philadelphia, Pa., on the first day of the Democratic National Convention, July 25, 2016. (Photo By Tom Williams/CQ Roll Call)

UNITED STATES - JULY 25: Connor Garrett, 9, of Connecticut, and his father, Dan, walk down Broad Street during a march by supporters of Sen. Bernie Sanders, I-Vt., in Philadelphia, Pa., on the first day of the Democratic National Convention, July 25, 2016. (Photo By Tom Williams/CQ Roll Call)

Members of the media stand during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Daniel Acker/Bloomberg via Getty Images

Representative Diane Russell, a Democrat from Maine, gestures while speaking during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: David Paul Morris/Bloomberg via Getty Images

Representative Elijah Cummings, a Democrat from Maryland, speaks during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: David Paul Morris/Bloomberg via Getty Images

A delegate holds a sign reading 'Love Trumps Hate' during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Daniel Acker/Bloomberg via Getty Images

UNITED STATES - JULY 25: Karla and Francisca Ortiz, of Las Vegas, speak on stage during the Democratic National Convention in Philadelphia on Monday, July 25, 2016. Karla is an American citizen, but her parents are undocumented and live in fear of deportation. Karla met Hillary Clinton in Nevada and was featured in the campaign ad, Brave. (Photo By Bill Clark)

Bill Clinton, former U.S. President, left, waves during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: David Paul Morris/Bloomberg via Getty Images

Senator Elizabeth Warren, a Democrat from Massachusetts, speaks during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Daniel Acker/Bloomberg via Getty Images

UNITED STATES - JULY 25: Former candidate for President Sen. Bernie Sanders (D-VT) speaks at the Democratic National Convention in Philadelphia on Monday, July 25, 2016. (Photo By Bill Clark/CQ Roll Call)

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But that didn't seem to placate some Sanders delegates and grassroots supporters.

Many of the senator's delegates in the hall were still incensed that the party platform refused to adopt official language opposing the Trans-Pacific Partnership, a multi-national trade deal supported by the Obama administration but opposed by many in both parties for its potential effects on American manufacturing and jobs.

When the Democratic rules committee took its vote early in the evening, many Sanders supporters booed the platform, voting "nay" when it was put up for a so-called "voice vote."

Chris, an alternate delegate for Sanders, told Business Insider it was "a darned shame" that Democrats weren't more vocally opposing TPP.

"They completely ignored it. We had signs: 'No TPP.' Elijah completely ignored it. And a lot of people felt slighted from it, and a lot of people felt hurt and afraid," he said, referring to Rep. Elijah Cummings.

Sanders supporters were also not impressed by a slick video about the party platform that played on the Jumbotron, highlighting the leftward tilt of the platform.

RELATED: How Bernie Sanders supporters would vote in the general election

Dean Vanderstone, a Sanders delegate from Michigan, told Business Insider that while he was pleased with some of the changes in the platform, he said the whole convention was "a farce."

"It wasn't as smooth and clean and kumbaya as you heard from the speakers," Vanderstone said of the platform drafting committee, noting his discussions with Sanders supporters on the rules and drafting committees. "There was a lot of dissension."

Still, while the Clinton campaign scrambled to placate delegates, moving Sanders into a primetime speaking slot, were more hopeful about party unity going forward.

"There's a lot of great energy. Sen. Sanders has been fantastic about helping to unify the party. I'm confident that he'll do it tonight. And I'm confident in November we'll have an overwhelming Democratic turnout to defeat Donald Trump," Housing and Urban Development Secretary Julian Castro told Business Insider, noting he was speaking in his personal capacity as a Clinton supporter.

He added: "Bernie provided a tremendous positive voice for change. And Hillary has embraced so much of the policy positions and the spirit of Bernie's campaign. So the ground is set for us to more forward as a united democratic party."

Sanders ended the night with a strong call for unity amid the day of relative chaos with that primetime speech, closing out the night with a forceful endorsement of Clinton.

Said Sanders: "Hillary Clinton will make an outstanding president and I am proud to stand with her here tonight."